钛液滴作用下钛合金薄片火蔓延的数值模拟

doi:10.7527/S1000-6893.2021.25652

Abstract

Abstract: This work analyzes the flame spread behaviors of the titanium-alloy sheet in the experiment of the titanium-fire-drop method. The flame spread process of titanium alloy under the effect of a high-temperature heat source was investigated based on numerical simulation. The process of flame spread of titanium-alloy sheet after being ignited in the center under different initial temperatures and environmental conditions is studied. The conditions of the titanium-alloy sheet being burned to fracture are analyzed. The results show that the flame front propagated in an arc shape at the beginning, and stretched at the edge of the sheet due to the edge effect. When the initial temperature of the sheet was low, the flame of the titanium alloy after ignition spread for a short time and then went out slowly. The titanium alloy sheet was finally burned to fracture when the initial temperature was high. Parameter analysis shows that the critical convective heat transfer coefficient of combustion fracture of the titanium alloy sheet is linearly related to the initial temperature, and the relationship between the critical partial pressure of oxygen and the initial temperature is a negative exponential function.

Key words: titanium alloy, titanium droplet, flame spread, critical condition, parameter analysis

CLC Number:

V19
TK05

LUO Shengfeng, WANG Guangjian, MA Xiaobin, ZHENG Lili, WANG Ruijun. Simulation of flame spread of titanium-alloy sheet under effect of titanium droplet[J]. ACTA AERONAUTICAET ASTRONAUTICA SINICA, 2022, 43(9): 425652-425652.

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Simulation of flame spread of titanium-alloy sheet under effect of titanium droplet

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